Web feeding and sheet cutting mechanism



Dec. 19, 1933. H. M, BARBER WEB FEEDING AND SHEET CUTTING MECHANISM Filed Dec. 31. 1931 4 Sheets-Sheet l INVENTOR r 7% BY ATTORNEYS Dec. 19, 1933. H. M. BARBER WEB FEEDING AND SHEET CUTTING MECHANISM Filed Dec. 31. 1931 4 Sheets-Sheet 2 INVENTOR /%WWW% ATTORNEYS Dec. 19, 1933. H. M. BARBER WEB FEEDING AND SHEET CUTTING MECHANISM Filed Dec. 31. 1931 4 Sheets-Sheet 3 INVENTOR 44M744; %/M

' ATTORN EYS Dec. 19, 1933. H. M. BARBER WEB FEEDING AND SHEET CUTTING MECHANISM Filed Dec. 51. 1931 4 Sheets-Sheet 4 Patented Dec. 19, 1933 1 UNITED STA WEB FEEDING AND SHEET CUTTING:

MECHAN SM Howard M. Barber, Pawcatuck, Conn.,assignor to C.'B. Cottrell: & Sons Company, Westerly, R. 1., a corporation of Delaware Application December 31, 1931- Serial No. 584,074

g 9 Claims. (01. ce-c703 In the past it has been ccinmon to feed meas frame 2 and. is herein illustratedas Comprising l ured lengths of. webtoasheet cutter where sheets of predetermined lengths have been cut from the web and to deposit the so cut sheets onto an endless tape carrier to be fed to a sheet taking frame and is herein shown as comprising the following elements: The primary web feeding rollis denoted by 16 and its coacting pressure roll by device for subsequent operations, such as printing and/or folding. This arrangement has worked satisfactorilywith longer sheets but not so satisfactorily with shorter sheets and especially veryshort-sheets'.

The object of this invention, therefore, is to provide means whereby very short sheets as well as longsheets may be fed in exact register to their sheet taking device Myinvention comprises, generally, means whereby both the web feeder and the sheet cutter which are carriedby an auxiliary frame slidably mounted on the "main frame may be adjusted as aunit toward and away from thesheet taking device which is carried by the main frame, an extension guide being interposed between the web feeder and the sheet'taking device.

My invention further comprises means whereby the web is temporarily arrested by a pressure device acting on the web upon both sides of the sheet cutter just as the leading edge of the web reaches the sheet taking device and just before the sheet is'seve'red from the web; thereby assuring a square cut and a perfect register for the sheet.

A practical represented in the accompanying drawings in which:

Fig. 1 represents a top plan view of the ma thi Fig. 2,represents a detail side view of the same;

Fig. 3 machine r Fig. 4 represents a detail longitudinal vertical section on an enlarged scale taken in the planes of the line IVIV of Fig. l; and 1 Fig. 5 represents a detail section showing the represents a detail end view of the means for mounting and adjusting the auxiliary iliary frame which is movable along an inclined plane with respect to the main frame is denoted .A sheet taking device is-carried by the main frame, which device is herein shown as a set of folding cylinder 11. C1

grippers 3 on' the impression cylinder 4 of .a

printing unit, the coacting form cylinders of which are denoted by 5, and 6. The grippers 3 are arranged to transfer thetwocolor printed sheets to grippers '7 of a folding cylinder 8, which The sheet cutter is carried by the auxiliary embodiment of my invention is a rotary cutter 12, theknife 13 of which is arranged to coast with the knife 14 of a stationary block-l5. j

The web feeder is also carried by the auxiliary 17. The, secondary web feeding roll is denoted by 18 andits coacting pressure feed rollsby 19 and20.-,

An inclined extension guide has a fixed member 21 interposed between the web feeder andthe sheet cutter. Thisinclined guide also hasoverlapping members 22 and 23 carriedby the auxiliary and main frames respectively, said members being. interposed between the sheet cutter and the sheet taking device.

The means for manually moving the'auxiliary, frame along a plane parallel to the inclined extension guide. to adjust the positions of the sheet feeder and the sheet cutter with respect to; the

sheet taking deviceis as follows: The main frame is provided with inclined tracks24, which tracks haveundercut grooves 25 within which the heads of bolts 26 carried by-the auxiliary framez may be moved when their clamping nuts 27 are released. Racks 28 are secured along thesides of the auxiliary frame, which racks mesh with pinions 29 carried by a shaft 30 mountedin the main frame-1. This shaft 30 carries a worm gear'3l which meshes witha worm 32 on a hand shaft 33, the hand'wheel 34 of which is located outside the mainframe l inconvenient position for may said cords passing over guide pulleys 38, 39, and 40.

The means for driving the several mechanisms is. shown herein as comprising the following arrangement; The motor drive shaft 41 has-a belt and pulley connection.4=2, 43, a l withthe shaft 45 which carries thefirst gear 46.0f a train of gears 47, 48, 49, 50, 51 to the shaft 52 which car ries a sprocket 53 connected by'a chain 54 to a sprocket 55 on the shaft 56 ofthe rotary cutter'12.

This shaft 56 carriesfthe first gear of a train ofi gears 57, 58, 59, 59*, 60, 61, 6 2, connecting-the shaft 56 with theshaft 63 of the web feed roll 18. This shaft63 is provided with a sprocket wheel 64 which is connected bya chain 65 witha sprocket wheel 66 carried by the shaft 6'7 of the primary web feedroll 16. i a 'The device which I have'shown for clamping I the web to the guide uponoppositesides of the sheet cutter just as the leading edge of theweb reaches the sheet taking device and just before lever, the other arm '76 of which is connected by a rod '77 to one arm '78 carried by a rock shaft 79. This rock shaft carries a series of pressure fingers 80 arranged to press the web against the member 23 of the inclined guide between the sheet cutter and the sheet taking device.

l 7 From the above description it will be seen that I have provided means whereby the leading edge of the web is fed along the guide to its sheet taking point before the sheet is cut from the web and also that the movement of the web is arrested H momentarily while the sheet is being severed from 5 the web, thereby ensuring a square cut and a perfect register for the sheet. a It will also be seen that by providing means for moving the web feeder and sheet cutter as a H unit toward and away from the sheet taking device, very short sheets may be accurately handled.

It will also be seen that by substantially counterbalancing the auxiliary frame and the parts 3 carried thereby I am enabled to very easily adjust the auxiliary frame along the main frame to the desired position for the length of sheet to be cut from the web.

- It is evident that various changes may be resorted to in the construction, form and arrangement ,of the several parts without departing from the spirit and scope of my invention, and hence I do not intend to be limited to the particular embodiment herein shown and described,

, but

What I claim is: r

1. A sheet taking device, a web feeder, an in terposed sheet cutter, an extension sheet guide having fixed and movable members, said sheet guide extending downwardly and forwardly from the web feeder to the sheet taking device, and means for adjusting the web feeder, the sheet cutter and the movable member of the extension sheet guide as a unit in an inclined path toward and away from the sheet taking device.

2. A sheet taking device, a sheet cutter, an

inclined guide, means for feeding a web along the guide and through the sheet cutter to the sheet taking device, said inclined guide extending from'the web feeder to the sheet taking device, and a device for momentarily arresting the movement of the web as its leading edge reaches the sheet taking device and the sheet is about to be severed from the web.

3. A sheet taking device, a sheet cutter, an inclined guide, means for feeding a web along the guide and through the sheet cutter to the sheet taking device, said inclined guide extending from the web feeder to the sheet taking device, and a device for momentarily arresting the movement of the web as its leading edge reaches the sheet taking device and the sheet is about to be severed from the Web, said arresting device comprising members arranged to clamp the web to the guide upon opposite sides of the sheet cutter. 4. A sheet taking device, a sheet cutter. an inclined guide, means for feeding a web along the: guide and through the sheet cutter to the sheet taking device, a device for momentarily arresting the movement of the web as its leading edge reaches the sheet taking device and the sheet is about to be severed from the web, said arresting device comprising members arranged to clamp the Web to the guide upon opposite sides of the sheet cutter, and means for adjusting the web feeder and sheet cutter as a unit in an inclined path toward and away from the sheet taking device.

5. A main frame, an auxiliary frame, a sheet taking device carried by the main frame, a web feeder and a sheet cutter both carried by the auxiliary frame, means for moving the auxiliary frame to adjust the position of the feeder and cutter as a unit with respect to the sheet taking device, and an inclined guide interposed between the web feeder and sheet taking device, said guide having coacting overlapping members carried by the main and auxiliary frames respectively.

6. A main frame, an auxiliary frame, a sheet taking device carried by the main frame, an inclined guide, a sheet cutter and a web feeder both carried by the auxiliary frame, the feeder being located upon the opposite side of the sheet cutter from the sheet taking device and operable to feed the web along said inclined guide through the sheet cutter to the sheet taking device, and means for causing the severance of the sheet from the web substantially coincident with the taking of the sheet by the sheet taking device.

7. A main frame, an auxiliaryframe, a sheet taking device carried by the main frame, an inclined guide, a sheet cutter and a web feederboth carried by the auxiliary frame, the feederbeing operable to feed the web along said guide through the sheet cutter to the sheet taking device, means for causing the severance of the sheet from the web substantially coincident with the taking of the sheet by the sheet taking device, and a device for momentarily arresting the travel of the web during the severance of the sheet therefrom.

8. Ainain frame, an auxiliary frame, a sheet taking device carried by the main frame, an inclined guide, a sheet cutter and a web feeder both carried by the auxiliary frame, the feeder being operable to feed the web along said guide through the sheet cutter to the sheet taking device, means for causing the severance of the sheet from the web substantially coincident with the taking of the sheet by the sheettaking device, and means for moving the auxiliary frame along an inclined path to adjust the position of the sheet cutter and web feeder with respect to the sheet taking device. v

9. A main frame, an auxiliary frame, a sheet taking device carried by the mainframe, an inclined guide, a sheet cutter and a web feeder both carried by the auxiliary frame, the feeder being operable. to feed the web along said guide vice, means for causing the severance of the sheet from the web substantially coincident with the taking of the sheet by the sheet taking device, a device for momentarily arresting the travel of the web during the severance of the sheet therefrom, and means for moving the auxiliary frame along an inclined path to adjust the posi tion, of the sheet cutter and web feederwith respect to-the sheet'taking device.

HOWARD M. BARBER.

through the sheet cutter to the sheet taking'de- 

